diff --git a/changelogs/fragments/264-postgresql_idx_add_trust_input_parameter.yml b/changelogs/fragments/264-postgresql_idx_add_trust_input_parameter.yml
new file mode 100644
index 0000000000..0b056831b6
--- /dev/null
+++ b/changelogs/fragments/264-postgresql_idx_add_trust_input_parameter.yml
@@ -0,0 +1,2 @@
+minor_changes:
+- postgresql_idx - add the ``trust_input`` parameter (https://github.com/ansible-collections/community.general/pull/264).
diff --git a/plugins/modules/database/postgresql/postgresql_idx.py b/plugins/modules/database/postgresql/postgresql_idx.py
index 507af2a32e..2efdd17ef1 100644
--- a/plugins/modules/database/postgresql/postgresql_idx.py
+++ b/plugins/modules/database/postgresql/postgresql_idx.py
@@ -114,6 +114,11 @@ options:
     - Mutually exclusive with I(concurrent=yes)
     type: bool
     default: no
+  trust_input:
+    description:
+    - If C(no), check whether values of some parameters are potentially dangerous.
+    type: bool
+    default: yes
 
 seealso:
 - module: postgresql_table
@@ -258,6 +263,7 @@ except ImportError:
     pass
 
 from ansible.module_utils.basic import AnsibleModule
+from ansible_collections.community.general.plugins.module_utils.database import check_input
 from ansible_collections.community.general.plugins.module_utils.postgres import (
     connect_to_db,
     exec_sql,
@@ -360,7 +366,8 @@ class Index(object):
             self.exists = False
             return False
 
-    def create(self, tblname, idxtype, columns, cond, tblspace, storage_params, concurrent=True, unique=False):
+    def create(self, tblname, idxtype, columns, cond, tblspace,
+               storage_params, concurrent=True, unique=False):
         """Create PostgreSQL index.
 
         Return True if success, otherwise, return False.
@@ -391,12 +398,9 @@ class Index(object):
         if concurrent:
             query += ' CONCURRENTLY'
 
-        query += ' %s' % self.name
+        query += ' "%s"' % self.name
 
-        if self.schema:
-            query += ' ON %s.%s ' % (self.schema, tblname)
-        else:
-            query += 'public.%s ' % tblname
+        query += ' ON "%s"."%s" ' % (self.schema, tblname)
 
         query += 'USING %s (%s)' % (idxtype, columns)
 
@@ -404,7 +408,7 @@ class Index(object):
             query += ' WITH (%s)' % storage_params
 
         if tblspace:
-            query += ' TABLESPACE %s' % tblspace
+            query += ' TABLESPACE "%s"' % tblspace
 
         if cond:
             query += ' WHERE %s' % cond
@@ -438,9 +442,9 @@ class Index(object):
             query += ' CONCURRENTLY'
 
         if not schema:
-            query += ' public.%s' % self.name
+            query += ' "public"."%s"' % self.name
         else:
-            query += ' %s.%s' % (schema, self.name)
+            query += ' "%s"."%s"' % (schema, self.name)
 
         if cascade:
             query += ' CASCADE'
@@ -475,6 +479,7 @@ def main():
         storage_params=dict(type='list', elements='str'),
         cascade=dict(type='bool', default=False),
         schema=dict(type='str'),
+        trust_input=dict(type='bool', default=True),
     )
     module = AnsibleModule(
         argument_spec=argument_spec,
@@ -493,6 +498,13 @@ def main():
     storage_params = module.params["storage_params"]
     cascade = module.params["cascade"]
     schema = module.params["schema"]
+    session_role = module.params["session_role"]
+    trust_input = module.params["trust_input"]
+
+    if not trust_input:
+        # Check input for potentially dangerous elements:
+        check_input(module, idxname, session_role, schema, table, columns,
+                    tablespace, storage_params, cond)
 
     if concurrent and cascade:
         module.fail_json(msg="Concurrent mode and cascade parameters are mutually exclusive")
diff --git a/tests/integration/targets/postgresql_idx/tasks/postgresql_idx_initial.yml b/tests/integration/targets/postgresql_idx/tasks/postgresql_idx_initial.yml
index 19de216f2a..095165c59b 100644
--- a/tests/integration/targets/postgresql_idx/tasks/postgresql_idx_initial.yml
+++ b/tests/integration/targets/postgresql_idx/tasks/postgresql_idx_initial.yml
@@ -3,17 +3,20 @@
   become: true
   shell: psql postgres -U "{{ pg_user }}" -t -c "CREATE TABLE test_table (id int, story text);"
   ignore_errors: true
+
 - name: postgresql_idx - drop test tablespace called ssd if exists
   become_user: '{{ pg_user }}'
   become: true
   shell: psql postgres -U "{{ pg_user }}" -t -c "DROP TABLESPACE IF EXISTS ssd;"
   ignore_errors: true
+
 - name: postgresql_idx - drop dir for test tablespace
   become: true
   file:
     path: /mnt/ssd
     state: absent
   ignore_errors: true
+
 - name: postgresql_idx - create dir for test tablespace
   become: true
   file:
@@ -22,22 +25,26 @@
     owner: '{{ pg_user }}'
     mode: '0755'
   ignore_errors: true
+
 - name: postgresql_idx - create test tablespace called ssd
   become_user: '{{ pg_user }}'
   become: true
   shell: psql postgres -U "{{ pg_user }}" -t -c "CREATE TABLESPACE ssd LOCATION '/mnt/ssd';"
   ignore_errors: true
   register: tablespace
+
 - name: postgresql_idx - create test schema
   become_user: '{{ pg_user }}'
   become: true
   shell: psql postgres -U "{{ pg_user }}" -t -c "CREATE SCHEMA foo;"
   ignore_errors: true
+
 - name: postgresql_idx - create table in non-default schema
   become_user: '{{ pg_user }}'
   become: true
   shell: psql postgres -U "{{ pg_user }}" -t -c "CREATE TABLE foo.foo_table (id int, story text);"
   ignore_errors: true
+
 - name: postgresql_idx - create btree index in check_mode
   become_user: '{{ pg_user }}'
   become: true
@@ -50,6 +57,7 @@
   check_mode: true
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is changed
@@ -61,6 +69,7 @@
     - result.storage_params == []
     - result.schema == ''
     - result.query == ''
+
 - name: postgresql_idx - check nothing changed after the previous step
   become_user: '{{ pg_user }}'
   become: true
@@ -69,9 +78,11 @@
     login_user: '{{ pg_user }}'
     query: SELECT 1 FROM pg_indexes WHERE indexname = 'test0_idx'
   register: result
+
 - assert:
     that:
     - result.rowcount == 0
+
 - name: postgresql_idx - create btree index concurrently
   become_user: '{{ pg_user }}'
   become: true
@@ -81,8 +92,10 @@
     table: test_table
     columns: id, story
     idxname: test0_idx
+    trust_input: no
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is changed
@@ -93,7 +106,8 @@
     - result.tblspace == ''
     - result.storage_params == []
     - result.schema == 'public'
-    - result.query == 'CREATE INDEX CONCURRENTLY test0_idx ON public.test_table USING BTREE (id, story)'
+    - result.query == 'CREATE INDEX CONCURRENTLY "test0_idx" ON "public"."test_table" USING BTREE (id, story)'
+
 - name: postgresql_idx - check the index exists after the previous step
   become_user: '{{ pg_user }}'
   become: true
@@ -102,9 +116,11 @@
     login_user: '{{ pg_user }}'
     query: SELECT 1 FROM pg_indexes WHERE indexname = 'test0_idx'
   register: result
+
 - assert:
     that:
     - result.rowcount == 1
+
 - name: postgresql_idx - try to create existing index again
   become_user: '{{ pg_user }}'
   become: true
@@ -116,6 +132,7 @@
     idxname: test0_idx
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is not changed
@@ -127,6 +144,7 @@
     - result.storage_params == []
     - result.schema == 'public'
     - result.query == ''
+
 - name: postgresql_idx - create btree index - non-default schema, tablespace, storage parameter
   become_user: '{{ pg_user }}'
   become: true
@@ -141,9 +159,11 @@
     idxname: foo_test_idx
     tablespace: ssd
     storage_params: fillfactor=90
+    trust_input: no
   register: result
   ignore_errors: true
   when: tablespace.rc == 0
+
 - assert:
     that:
     - result is changed
@@ -154,8 +174,9 @@
     - result.tblspace == 'ssd'
     - result.storage_params == [ "fillfactor=90" ]
     - result.schema == 'foo'
-    - result.query == 'CREATE INDEX CONCURRENTLY foo_test_idx ON foo.foo_table USING BTREE (id,story) WITH (fillfactor=90) TABLESPACE ssd'
+    - result.query == 'CREATE INDEX CONCURRENTLY "foo_test_idx" ON "foo"."foo_table" USING BTREE (id,story) WITH (fillfactor=90) TABLESPACE "ssd"'
   when: tablespace.rc == 0
+
 - name: postgresql_idx - create brin index not concurrently
   become_user: '{{ pg_user }}'
   become: true
@@ -169,8 +190,10 @@
     columns: id
     idxname: test_brin_idx
     concurrent: false
+    trust_input: no
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is changed
@@ -181,8 +204,9 @@
     - result.tblspace == ''
     - result.storage_params == []
     - result.schema == 'public'
-    - result.query == 'CREATE INDEX test_brin_idx ON public.test_table USING brin (id)'
+    - result.query == 'CREATE INDEX "test_brin_idx" ON "public"."test_table" USING brin (id)'
   when: postgres_version_resp.stdout is version('9.5', '>=')
+
 - name: postgresql_idx - create index with condition
   become_user: '{{ pg_user }}'
   become: true
@@ -193,8 +217,10 @@
     columns: id
     idxname: test1_idx
     cond: id > 1 AND id != 10
+    trust_input: no
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is changed
@@ -205,7 +231,8 @@
     - result.tblspace == ''
     - result.storage_params == []
     - result.schema == 'public'
-    - result.query == 'CREATE INDEX CONCURRENTLY test1_idx ON public.test_table USING BTREE (id) WHERE id > 1 AND id != 10'
+    - result.query == 'CREATE INDEX CONCURRENTLY "test1_idx" ON "public"."test_table" USING BTREE (id) WHERE id > 1 AND id != 10'
+
 - name: postgresql_idx - create unique index
   become_user: '{{ pg_user }}'
   become: true
@@ -216,8 +243,10 @@
     columns: story
     idxname: test_unique0_idx
     unique: true
+    trust_input: no
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is changed
@@ -228,7 +257,8 @@
     - result.tblspace == ''
     - result.storage_params == []
     - result.schema == 'public'
-    - result.query == 'CREATE UNIQUE INDEX CONCURRENTLY test_unique0_idx ON public.test_table USING BTREE (story)'
+    - result.query == 'CREATE UNIQUE INDEX CONCURRENTLY "test_unique0_idx" ON "public"."test_table" USING BTREE (story)'
+
 - name: postgresql_idx - avoid unique index with type different of btree
   become_user: '{{ pg_user }}'
   become: true
@@ -243,10 +273,12 @@
     type: brin
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is not changed
     - result.msg == 'Only btree currently supports unique indexes'
+
 - name: postgresql_idx - drop index from specific schema cascade in check_mode
   become_user: '{{ pg_user }}'
   become: true
@@ -258,10 +290,12 @@
     cascade: true
     state: absent
     concurrent: false
+    trust_input: yes
   check_mode: true
   register: result
   ignore_errors: true
   when: tablespace.rc == 0
+
 - assert:
     that:
     - result is changed
@@ -270,6 +304,7 @@
     - result.schema == 'foo'
     - result.query == ''
   when: tablespace.rc == 0
+
 - name: postgresql_idx - check the index exists after the previous step
   become_user: '{{ pg_user }}'
   become: true
@@ -279,10 +314,12 @@
     query: SELECT 1 FROM pg_indexes WHERE indexname = 'foo_test_idx' AND schemaname = 'foo'
   register: result
   when: tablespace.rc == 0
+
 - assert:
     that:
     - result.rowcount == 1
   when: tablespace.rc == 0
+
 - name: postgresql_idx - drop index from specific schema cascade
   become_user: '{{ pg_user }}'
   become: true
@@ -297,14 +334,16 @@
   register: result
   ignore_errors: true
   when: tablespace.rc == 0
+
 - assert:
     that:
     - result is changed
     - result.name == 'foo_test_idx'
     - result.state == 'absent'
     - result.schema == 'foo'
-    - result.query == 'DROP INDEX foo.foo_test_idx CASCADE'
+    - result.query == 'DROP INDEX "foo"."foo_test_idx" CASCADE'
   when: tablespace.rc == 0
+
 - name: postgresql_idx - check the index doesn't exist after the previous step
   become_user: '{{ pg_user }}'
   become: true
@@ -314,10 +353,12 @@
     query: SELECT 1 FROM pg_indexes WHERE indexname = 'foo_test_idx' and schemaname = 'foo'
   register: result
   when: tablespace.rc == 0
+
 - assert:
     that:
     - result.rowcount == 0
   when: tablespace.rc == 0
+
 - name: postgresql_idx - try to drop not existing index
   become_user: '{{ pg_user }}'
   become: true
@@ -329,6 +370,7 @@
     state: absent
   register: result
   ignore_errors: true
+
 - assert:
     that:
     - result is not changed